Abstract: A method for assigning a set of tasks to a plurality of mining machines, said machines being arranged to be driven between positions for performing tasks is provided. The method includes defining a first set of constraints to be fulfilled finding an overall solution fulfilling the first set of constraints by solving each constraint as a sub-problem, a solution to at least one sub-problem being dependent on the solution of at least one other sub-problem; the overall solution fulfilling the first set of constraints being an overall solution where a first of said sub-problems is validated by solutions of others of the sub-problems, and assigning tasks to the machines according to the determined validated overall solution, wherein tasks are arranged to be carried out at least partially overlapping in time by the mining machines.

Abstract: Arrangement (10) for a rock grouting equipment for positioning at least one cartridge (11) is described. The arrangement incorporates at least one magazine (12), arranged around an axis (15). The magazine (12) incorporates at least one space (13), in which space (13) a plurality of said cartridges (11) is stored. The arrangement further incorporates at least one, radially extending, catching device (3, 14), arranged and formed such that it catches at least one cartridge (11) between itself and the inner surface (4) of the magazine body (12), when it performs a rotating movement around the axis (15). The invention also relates to a method.

Abstract: A handling device for handling drill string components in a rock drill rig which includes a rotator device being arranged for rotation and driving of a drill string component and being supported movable to and fro on a feed beam. The handling device includes an introducing unit configured to introduce drill string components into respectively remove drill string components from a drill string position of the rock drill rig. A guiding beam includes a longitudinal guide. A gripper shuttle is drivingly displaceable along the longitudinal guide. The gripper shuttle includes a pivotally arranged guiding gripper for gripping a first end region of a drill string component. The gripper shuttle carries a drive motor for driving a drive wheel. The drive wheel is disengageable to allow essentially free movement of the gripper shuttle along the longitudinal guide. Also, a rock drill rig.

Abstract: The present invention relates to a percussion rock drilling machine comprising a front head (1), in which front head (1) are arranged a flush housing (26) and a flush connector (25) for flushing medium. According to the invention, a sheath (31) of rust-resistant material is arranged at the front head (1) around the flush housing (26), such that flushing medium can enter the flush housing (26) through the flush connector (25), without coming into contact with the front head (1).

Abstract: Handling device for a rock drill rig for handling drill string components for a drill string, wherein the handling device includes a linear guide, a slide being displaceable along the linear guide, and, supported by the slide, a gripping device, being displaceable between a drill string position in the rock drill rig and a delivering position outside the rock drill rig. The gripping device is supported by a swing arm which is swing drivable around a first rotational axis. The swing arm is swing drivable in respect of the slide around a second rotation axis. The swing arm support and the swing arm are swing drivable around a third rotational axis for swinging the gripping device to the drill string position.

Abstract: Herein a bolt (2) comprising an elongated body (4) with a central axis (C) is described. The elongated body (4) is in a first end (6) provided with a first thread (8) and in a second end (10) with a second thread (12). An intermediate part (14) of the elongated body (4) is provided with a collar (16). The collar (16) is provided with at least one first flat surface (18), which first flat surface (18) extends substantially in parallel with the central axis (C). Further, a rock drill comprising housing parts held together by at least one bolt (2) is described.

Abstract: The invention relates to a method pertaining to a bolting configuration (299) where a drilling unit and a bolting unit are arranged to be supported by a bottom carriage (330) via a respective top carriage (271; 272), wherein said bottom carriage (330) is arranged to be supported by a feed beam (230), relative to which said bottom carriage (330) is displaceable, wherein said top carriages (271; 272) are arranged to alternately be supported by said bottom carriage (330) to alternately be brought into operative engagement and hereby alternately be locked relative to said bottom carriage (330).